package com.sky.service.impl;

import com.alibaba.druid.sql.visitor.functions.If;
import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import io.swagger.models.auth.In;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class ReportServiceImpl implements ReportService {
	@Autowired
	private OrderMapper orderMapper;
	@Autowired
	private UserMapper userMapper;
	@Autowired
	private WorkspaceService workspaceService;

	/**
	 * 统计指定时间区间内的营业额
	 *
	 * @param begin
	 * @param end
	 * @return
	 */
	@Override
	public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
		//存放begin-end范围内每天日期
		List<LocalDate> dateList = new ArrayList<>();

		dateList.add(begin);
		while (!begin.equals(end)) {
			begin = begin.plusDays(1);
			dateList.add(begin);
		}

		//存放每天营业额
		List<Double> turnoverList = new ArrayList<>();
		for (LocalDate date : dateList) {
			//查询date日期对应的营业额数据，状态为已完成的订单金额合计
			//select sum(amount) from orders where order_time > ? and order_time < ? and status = 5
			LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
			LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

			Map map = new HashMap<>();
			map.put("begin", beginTime);
			map.put("end", endTime);
			map.put("status", Orders.COMPLETED);
			Double turnover = orderMapper.sumByMap(map);
			turnover = turnover == null ? 0.0 : turnover;
			turnoverList.add(turnover);
		}
		return TurnoverReportVO.builder()
				.dateList(StringUtils.join(dateList, ","))
				.turnoverList(StringUtils.join(turnoverList, ","))
				.build();
	}

	/**
	 * 统计指定时间区间内的用户数量
	 *
	 * @param begin
	 * @param end
	 * @return
	 */
	@Override
	public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
		//存放begin-end范围内每天日期
		List<LocalDate> dateList = new ArrayList<>();

		dateList.add(begin);
		while (!begin.equals(end)) {
			begin = begin.plusDays(1);
			dateList.add(begin);
		}

		List<Integer> totalUserList = new ArrayList<>();
		List<Integer> newUserList = new ArrayList<>();
		for (LocalDate date : dateList) {
			//查询date日期对应新增用户 和 截至当天用户总量
			//select count(id) from user where create_time > ? and create_time < ?
			//select count(id) from user where create_time < ?
			LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
			LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

			Map map = new HashMap<>();
			map.put("end", endTime);
			//总用户数量
			Integer totalUser = userMapper.countByMap(map);


			map.put("begin", beginTime);
			//新增用户数量
			Integer newUser = userMapper.countByMap(map);

			totalUserList.add(totalUser);
			newUserList.add(newUser);
		}

		return UserReportVO.builder()
				.dateList(StringUtils.join(dateList, ","))
				.totalUserList(StringUtils.join(totalUserList, ","))
				.newUserList(StringUtils.join(newUserList, ","))
				.build();
	}

	/**
	 * 统计指定时间内的订单数量
	 *
	 * @param begin
	 * @param end
	 * @return
	 */
	@Override
	public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
		//存放begin-end范围内每天日期
		List<LocalDate> dateList = new ArrayList<>();

		dateList.add(begin);
		while (!begin.equals(end)) {
			begin = begin.plusDays(1);
			dateList.add(begin);
		}
		//当天总订单数
		List<Integer> orderCountList = new ArrayList<>();
		//当天有效订单数
		List<Integer> validOrderCountList = new ArrayList<>();

		for (LocalDate date : dateList) {
			//查询date日期对应总订单 和 有效订单
			//select count(id) from orders where order_time > ? and order_time < ?
			//select count(id) from orders where order_time > ? and order_time < ? and status = 5
			LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
			LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

			Map map = new HashMap<>();
			map.put("begin", beginTime);
			map.put("end", endTime);
			//当日总订单数
			Integer totalOrder = orderMapper.countByMap(map);
			orderCountList.add(totalOrder);

			map.put("status", Orders.COMPLETED);
			//当日有效订单数
			Integer validOrder = orderMapper.countByMap(map);
			validOrderCountList.add(validOrder);
		}

		//指定时间区间的的总订单数
		Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
		//指定时间区间的总有效订单数
		Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
		//订单完成率
		Double orderCompletionRate = 0.0;
		if (totalOrderCount != 0) {
			orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
		}


		return OrderReportVO.builder()
				.dateList(StringUtils.join(dateList, ","))
				.orderCountList(StringUtils.join(orderCountList, ","))
				.validOrderCountList(StringUtils.join(validOrderCountList, ","))
				.totalOrderCount(totalOrderCount)
				.validOrderCount(validOrderCount)
				.orderCompletionRate(orderCompletionRate)
				.build();
	}

	/**
	 * 查询指定时间内的销量排名tom10
	 *
	 * @param begin
	 * @param end
	 * @return
	 */
	@Override
	public SalesTop10ReportVO getSalesTop(LocalDate begin, LocalDate end) {

		Map map = new HashMap<>();
		map.put("begin", LocalDateTime.of(begin, LocalTime.MIN));
		map.put("end", LocalDateTime.of(end, LocalTime.MAX));

		List<GoodsSalesDTO> salesTopList = orderMapper.getSalesTop10(map);

		List<String> nameList = new ArrayList<>();
		List<Integer> numberList = new ArrayList<>();

		salesTopList.forEach(GoodsSales -> {
			nameList.add(GoodsSales.getName());
			numberList.add(GoodsSales.getNumber());
		} );


		return SalesTop10ReportVO.builder()
				.nameList(StringUtils.join(nameList,","))
				.numberList(StringUtils.join(numberList,","))
				.build();
	}

	/**
	 * 导出运营数据报表
	 *
	 * @param response
	 */
	@Override
	public void exportBusinessData(HttpServletResponse response) {
		//1. 查询数据库，获取营业数据---查询最近30天的运营数据
		LocalDate dateBegin = LocalDate.now().minusDays(30);
		LocalDate dateEnd = LocalDate.now().minusDays(1);

		//查询概览数据
		BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

		//2. 通过POI将数据写入到Excel文件中
		InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

		try {
			//基于模板文件创建一个新的Excel文件
			XSSFWorkbook excel = new XSSFWorkbook(in);

			//获取表格文件的Sheet页
			XSSFSheet sheet = excel.getSheet("Sheet1");

			//填充数据--时间
			sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

			//获得第4行
			XSSFRow row = sheet.getRow(3);
			row.getCell(2).setCellValue(businessDataVO.getTurnover());
			row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
			row.getCell(6).setCellValue(businessDataVO.getNewUsers());

			//获得第5行
			row = sheet.getRow(4);
			row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
			row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

			//填充明细数据
			for (int i = 0; i < 30; i++) {
				LocalDate date = dateBegin.plusDays(i);
				//查询某一天的营业数据
				BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

				//获得某一行
				row = sheet.getRow(7 + i);
				row.getCell(1).setCellValue(date.toString());
				row.getCell(2).setCellValue(businessData.getTurnover());
				row.getCell(3).setCellValue(businessData.getValidOrderCount());
				row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
				row.getCell(5).setCellValue(businessData.getUnitPrice());
				row.getCell(6).setCellValue(businessData.getNewUsers());
			}

			//3. 通过输出流将Excel文件下载到客户端浏览器
			ServletOutputStream out = response.getOutputStream();
			excel.write(out);

			//关闭资源
			out.close();
			excel.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}
